According to the compile log,
there are no leaks so that is out of the question.
From background knowledge,
I am assuming you set the BrightnessHDR keyvalue to something other than the default.
Unfortunately, your lights will do exactly as you described when you set the the BrightnessHDR to something other than default.
The only fix for this is to delete the lights you set the keyvalue for and remake them.
Hopefully, you do not have a lot of lights to replace.
And if this has nothing to do with BrightnessHDR keyvalue,
try and tell us what changes you made to your map before this compile